Mix flour, baking powder, baking soda, nutmeg, mace, and cinnamon in a medium sized bowl. In a large bowl, beat at high speed with electric mixer, unsalted butter, granulated sugar and brown sugar until light and fluffy.

At low speed, add sweet potato and eggs one at a time until well mixed.

Pour batter into Bundt Pan. Add Pecans evenly on top of mix. (You can always add more before you bake if you like them a lot) Bake for approximately 55 minutes to one hour and 10 minutes or until a toothpick inserted comes out clean. Check cake at 55 minutes.